JP2932438B2 - Automatic spelling preparation mechanism for electric stapler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic stapling preparation mechanism for automatically setting a sheet-like staple in an electric stapler and then automatically preparing the stapling operation.

[0002]

2. Description of the Related Art Generally, an electric stapler of this type includes a sheet-like staple formed by connecting straight staples in the form of a sheet, as disclosed in Japanese Patent Laid-Open No. 4-129679. The sheet is sent to a lower predetermined position, formed into a U-shape by a forming plate, and then a formed staple is punched out by a driver plate to sew a sheet to be sewn.

Some feed mechanisms for feeding sheet staples to a predetermined position are configured to operate in conjunction with the driving of a forming plate and a driver plate. In this case, for example, when the sheet staple is removed from the stapler due to a processing of a spelling defect or the like, the sheet staple must be sent to a predetermined position by performing a blank hit operation several times until the actual stapling becomes possible.

[0004] However, the number of idle operations depends on the position of the next formed staple or sheet staple or the individual difference in the stapler, so that, for example, an electric stapler that automatically spells paper copied in a copying machine cannot be spelled. There is a problem that a booklet is generated or a staple is left on the clincher. Some clinchers are provided with a mechanism that allows the user to check the actual hitting state.
Since the idle operation is performed on the paper to be sewn, there is a problem that traces of the idle operation for several times remain on the paper.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide an automatic stapling preparation mechanism for an electric stapler which automatically prepares for a spelling operation.

[0006]

In order to achieve the above object, an automatic stapling preparation mechanism in an electric stapler according to the present invention is configured to feed a connected staple below a driver plate in conjunction with driving of the driver plate by an electric motor. In an electric stapler provided with means, detecting means for detecting that the foremost staple of the connected staples sent by the feeding means is sent below the driver plate is provided, and based on a detection signal by the detecting means, the electric and to return the driver plate to its initial position
The motor is stopped and said Rukoto.

The electric stapler is provided with a forming plate and a driver plate in a superposed state so as to be able to reciprocate at the same time in the plane direction thereof, and a straight staple in cooperation with the driving of the forming plate and the driver plate. Feeding means for feeding sheet-like staples formed in a sheet shape below the forming plate and the driver plate. When the forming plate and the driver plate are driven, the foremost staple is formed by the forming plate. It may be provided movably below the driver plate only after the operation.

[0008]

According to the first aspect of the present invention, the idle staple operation is performed in conjunction with the driving of the driver plate, so that the connection staple is sent below the driver plate. Then, when the foremost staple is sent below the driver plate, the detecting means detects this,
Based on the detection signal, the driver plate returns to the initial position, the electric motor stops, and the preparation for spelling is completed.

Therefore, according to the above-mentioned invention, the operation is automatically performed a required number of times until the actual hitting state is attained.
In this preparation stage, it is only necessary to wait without setting sheets to be sewn. For this reason, there is no possibility that a mark of the blank hit operation remains on the sewn sheet. Further, there is no inconvenience that an unspelled booklet is generated or a staple is left on the clincher.

According to the second aspect of the invention, the same effect as the first aspect of the invention can be obtained also in an electric stapler of a type in which a sheet-like staple is formed by a forming plate and a driver plate and then driven.

[0011]

FIG. 1 is a schematic view of an electric stapler according to the present invention. A groove cam 2 operatively connected to an electric motor is rotatably provided at the rear of left and right frames 1 of the electric stapler. A magazine 3 is provided at a front portion, and a spelling table 4 is further provided at a lower portion. A clincher 5 is provided on the spelling table 4.

At the front of the magazine 3, a forming plate 6 and a driver plate 7 are held in a superposed state on a holder (not shown). A drive link 9 is rotatably provided on the support shaft 8 of the frame 1. The front end of the drive link 9 is engaged with the holder, and the roller 10 at the rear end is engaged with the groove cam 2. Thus, when the groove cam 2 is rotated by the electric motor, the drive link 9 reciprocates and the forming plate 6 is rotated.
And the driver plate 7 are driven in the vertical direction, and at the same time, the magazine 3 follows in this direction and moves in the same direction.

The magazine 3 has a sheet-like staple 11 formed by connecting straight staples into a sheet.
(Same as the one disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 4-129679) are arranged in multiple stages. At the lower end of the front wall of the cartridge 12, an outlet (not shown) for the sheet staple 11 is formed.
From this outlet, the sheet-like staples 11 are sequentially fed from the bottom one along the staple guide 13 to the forming / driving part 17 below the forming plate 6 and the driver plate 7.

Next, a feeding means for feeding the sheet-like staples 11 includes a feed roller 18 provided below the staple guide, a pinion gear 19 meshing with the feed roller 18, and a rack 20 meshing with the pinion gear 19. It is configured. The feed roller 18 and the pinion gear 19 are arranged on the magazine 3, and the rack 20 is formed on the frame 1. Therefore, when the magazine 3 is driven upward together with the two plates 6 and 7, the pinion gear 19 is moved in conjunction with the rack 20 as shown in FIG.
, And at the same time, the feed roller 18 meshing with the pinion gear 19 rotates. Since the feed roller 18 is in contact with the lower surface of the lowermost sheet-like staple 11 of the cartridge 12, the rotation of the feed roller 18 causes the above-mentioned sheet-like staple 11 to be drawn out of the outlet of the cartridge 12 and formed along the staple guide. -First, it is sent to the former forming part of the driving part 17.

When the magazine 3 moves downward, the pinion gear 19 is disengaged from the rack 20 just before reaching the moving end, and when the magazine 3 moves further upward, it meshes with the rack 20 again. Rack 2 as done
The lower part 20a of the zero is formed so that the peak of the teeth gradually becomes smaller. When the magazine 3 moves downward, the pinion gear 19 meshes with the rack 20 and rotates in the reverse direction.
The feed roller 18 is configured not to reversely rotate by the clutch mechanism.

An anvil 21 is disposed below the forming plate 6 in the forming portion 17, and when the forming plate 6 is driven downward, the foremost staple needle 11a on the anvil 21 as shown in FIG. Both sides are pressed into a U-shape. Formed staple needle 11
a is sent to a driving portion below the driver plate 7 by a pusher (not shown) when the forming plate 6 is driven upward, and when the driver plate 7 is driven downward as shown in FIG. 11a is punched out, penetrates the paper 22 to be sewn on the spelling table 4, and is further folded by the clincher 5 to complete the spelling.

As described above, the gap between the staple outlet of the cartridge 12 and the forming / having section 17 is formed at a distance of about 1/2 of the length of the sheet staple 11, so that the first sheet staple 11 is formed. After the staples 11 are drawn out from the outlets, the frontmost staple 11a reaches the forming section only when the magazine 3 repeats up and down several times.

Next, as shown in FIGS. 4 and 5 (a), the front end of the magazine 3 has a staple 1 at the forefront of the sheet-like staple 11 fed by the feeding means.
Detecting means 23 for detecting that the sheet 1a has been formed and then sent below the driver plate 7 is provided, thereby constituting an automatic spelling preparation mechanism. The detecting means 23 includes an operating piece 24 and a sensor 25 for detecting a displacement of the operating piece 24. The operation piece 24 is supported by a support shaft 27 provided on the front wall of the magazine 3 in the left and right direction so as to be able to rotate back and forth. The upper side is always inclined forward by a compression spring 28, and the lower rear surface 24 a is located below the driver plate 7. Are biased so as to be located at the driving portion 17. The sensor 25 may be a photo sensor, but may be another sensor as long as it can detect the displacement of the operation piece 24, or may be a micro switch. Further, the electric motor is configured to stop when the groove cam 2 returns to the initial position based on the detection signal from the sensor 25.

According to the above configuration, the forming cam 6 and the driver plate 7 are continuously driven by rotating the groove cam 2, and the magazine 3 is continuously moved up and down as shown in FIG. 5 (b). When the sheet staple 11 is sent to the forming unit by the feed roller 18 and the foremost staple 11a is formed into a U-shape in the forming unit and then sent to the driving unit 17, the lower end rear surface 24a of the operating piece 24 becomes The compression spring 28 is pressed by the formed staple needle 11a.
And the upper end 24b moves rearward, the photo sensor 25 detects the displacement of the operation piece 24, and the electric motor stops. At this time, the forming plate 6 and the driver plate 7 are also in the initial state, and preparation for spelling is completed. Therefore, spelling can be executed after this.

According to the spelling preparation mechanism described above, the spelling preparation mechanism is automatically operated a required number of times until it becomes ready for actual hitting.
In this preparation stage, it suffices that the paper to be sewn is on standby without being set on the spelling table. For this reason, there is no possibility that a mark of the blank hit operation remains on the sewn sheet. Further, there is no inconvenience that an unspelled booklet is generated or a staple is left on the clincher.

Although the above-described example relates to a sheet-like staple, the spelling preparation mechanism is an electric stapler of a type in which staples formed by connecting U-shaped staples in advance are driven by a plurality of driver plates. The present invention can also be applied to a device provided with a feeding means for feeding the connected staples below the driver plate by interlocking with the driving by rotating the staples.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state before a spelling operation of an electric stapler having an automatic spelling preparation mechanism according to the present invention.

FIG. 2 is a schematic diagram showing a state of the electric stapler during a spelling operation.

FIGS. 3 (a) and 3 (b) are explanatory views of a form and a driving mode of a staple needle by the electric stapler, respectively.

FIG. 4 is a schematic front view of the automatic stapling preparation mechanism of the electric stapler.

5 (a) and 5 (b) are explanatory views before and after the operation of the automatic spelling preparation mechanism.

[Explanation of symbols]

 3 Magazine 6 Forming Plate 7 Driver Plate 11 Sheet Staple 11a Staple Needle at Front End 18 Feed Roller 19 Pinion Gear 20 Rack

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B25C 5/16 B25C 5/15 B25C 5/04 B27F 7/17

Claims (2)

(57) [Claims] 1. An electric stapler having a feeding means for feeding a connected staple below a driver plate in conjunction with driving of a driver plate by an electric motor, wherein a staple at the forefront of the connected staple sent by the feeding means is provided. provided detection means for detecting that transmitted beneath the driver plate, the upper and is returned to the initial position driver plate on the basis of the detection signal by the detection means
Automatic Spelling preparation mechanism in the electric stapler, wherein Rukoto stops the serial electric motor. 2. The stapler according to claim 1, wherein the electric stapler is provided so that the forming plate and the driver plate are overlapped with each other so that the forming plate and the driver plate can reciprocate simultaneously in a plane direction thereof. Feeding means for feeding sheet-like staples formed in a sheet shape below the forming plate and the driver plate. When the forming plate and the driver plate are driven, the foremost staple is formed by the forming plate. 2. The automatic stapling preparation mechanism in an electric stapler according to claim 1, wherein the automatic stapling mechanism is provided so as to be movable below the driver plate only after the operation.